הלכה על ברכות 9:24

It is from the roots of the commandment to fix in our hearts that the providence of God, blessed be He, is individualized upon everyone among people, and that His eyes are observing all of their ways, as it is written (Job 34:21), 'For His eyes are upon a man’s ways; all of his steps He sees." And therefore, he warned us to put our [minds] to this bad illness, and to think that it is sin that caused it - and as they, may their memory be blessed, said (Arakhin 16b) that it generally comes from evil speech, and we should not take it [as being] by way of happenstance. And we need to come to the priest, who is the one that is ready [to effect] the atonement of sinners. And in the company of the one who atones, maybe he will contemplate repentance. And he is put in quarantine for a few days, in order that he put his matters into his heart with deliberation, and examine his deeds (Berakhot 5a). And sometimes he is put into two [consecutive] quarantines, lest he contemplated repentance, but not complete full repentance. It is as if you would say by way of illustration, that he thought to return half of his robbery; and then God, blessed be He, renewed some of the signs that he should be quarantined a second time - perhaps he will complete his repentance and purify himself completely.